Usage

Arguments

mapping

Set of aesthetic mappings created by aes() or
aes_(). If specified and inherit.aes = TRUE (the
default), it is combined with the default mapping at the top level of the
plot. You must supply mapping if there is no plot mapping.

data

The data to be displayed in this layer. There are three
options:

If NULL, the default, the data is inherited from the plot
data as specified in the call to ggplot().

A data.frame, or other object, will override the plot
data. All objects will be fortified to produce a data frame. See
fortify() for which variables will be created.

A function will be called with a single argument,
the plot data. The return value must be a data.frame, and
will be used as the layer data.

stat

The statistical transformation to use on the data for this
layer, as a string.

position

Position adjustment, either as a string, or the result of
a call to a position adjustment function.

...

Other arguments passed on to layer(). These are
often aesthetics, used to set an aesthetic to a fixed value, like
colour = "red" or size = 3. They may also be parameters
to the paired geom/stat.

na.rm

If FALSE, the default, missing values are removed with
a warning. If TRUE, missing values are silently removed.

show.legend

logical. Should this layer be included in the legends?
NA, the default, includes if any aesthetics are mapped.
FALSE never includes, and TRUE always includes.
It can also be a named logical vector to finely select the aesthetics to
display.

inherit.aes

If FALSE, overrides the default aesthetics,
rather than combining with them. This is most useful for helper functions
that define both data and aesthetics and shouldn't inherit behaviour from
the default plot specification, e.g. borders().

Aesthetics

geom_spoke() understands the following aesthetics (required aesthetics are in bold):

x

y

angle

radius

alpha

colour

group

linetype

size

Learn more about setting these aesthetics in vignette("ggplot2-specs").